<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<br>
    <!-- <form action = "">
        姓名<input type = "text">
    </form> -->

    <!-- <form action="">
        姓名<input type="text">
        </br>
        密码<input type = "password">
    </form> -->

    <!-- <form action = "">
        性别<input type = "radio" name = "gender" >男
        <input type ="radio" name = "gender" >女
    </form> -->

    <!-- <form action="">
        爱好
        <input type = "checkbox" name = "hobby">篮球
        <input type = "checkbox" name = "hobby">足球
        <input type = "checkbox" name = "hobby">乒乓球
        </br>
        <input type = "button" value="提交">
    </form> -->

    <!-- <form action = "">
        课程：<input type = "text" name = "course" placeholder="请输入课程">
        <input type = "submit" value="确定">
        <input type = "reset" value="重置">
    </form> -->
    
    <form action = "">
        <input type = "file" name = "file">
    </form>
    
</body>
</html>